Rotary pump.



T. HYE, w. CAMPBELL & T. A. BATEMAN.

l ROTARY PUMP.

APPLICATION FILED IAR. l |913.

Patented May 25, 1915.

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A TTUIHIEY 'UMTED srATEs PATENT OFFICE.

THOMAS HYE, WILLIAM B. CAMPBELL, AND muertas AA. BATEMAN, or sroxANs,

WASHINGTON.

Bonny rtm1.

Specification of Letter Patent.

Patented May 25, 1915.

Application filed March 1, 1918. Serial No. 751,565.

T 1U who/n, 'it may concern.'

Be it known that we Ti-roMAs Hrs, Wn.- Lmu B. CAMPBELL, and faenas A. BATEMAN, citizens of the United States residing at Spokane, in the county of pokane and State of Washington, have invented certain new and useful Improvements in Rotar Pumps, of which the following is a speci cation.

This invention relates to that class of rotary pumps having a cylinder in which a rotor, carrying radial iston win s, works.

It is the object of tile present invention to provide an improved bearing or support for the rotor. whereby friction is reduced to a minimum, and also to provide a structure which enables repairs to the pump to be easily made, the parts subject to wear being removable. These objects are attained by means of a novel combination and arrangement of parts to be hereinafter.descrlbedv and claimed, and in order that the mvention may be better understood2 reference is had tothe accompanying drawmgs in which- Figure 1 is a longitudinal section ofthe ump. Fig. 2 is a vertical section on the line 2-2 of Fig. 1.

In the drawings denotes a circular casing which forms the pump cylinder, the same having a side inlet 11 and a top outlet 12. In this cylinder works a rotor 13 which is set eccentrically so as to come close to the cylinder wall at one point and peripherally engage a roller 10 mounted in said wall at this point, the ont of contact being on that side of the out et which is nearest the inlet. The roller has the same width as the rotor. The rotor is annular, and as it is eccentrically mounted in the cylinder, there is a eontinuous water space 1n the cylinder, from the inlet to the outlet, which permits a free flow and prevents chokin of the pump. The roller l0 makes a flui tight joint, and oflectually prevents leakage.

The rotor 13 is provided with radial iston wings 14, carrying anti-friction rol ers 14 at their outer ends. Three piston win are shown, although their number may e varied. The piston wings are loosely mounted on a sha t 15, the being formed with hubs 1G through which the shaft passes. The piston wings pass through openings in the rotor and project therefrom into contact with the cylinder wall.

Each end of the cylinder 10 is closed by a head 17 having an outstanding annular' flange 18 over the outer end of w lich is secured a head 19 to close up the space inside said flange. The flange 18 is eccentric to the rotor 13 and the inner face of the head 19 has a hub enlargement 20 through which the shaft 15 passes. The outer face of the head 19 has a stuflin box 21 for the shaft.

On each en of the rotor 13 is rigidly mounted an internal gear 22 which is in mesh with a pinion 23 fast on the shaft l5, whereby the rotor is driven. The shaft is belted or otherwise connected to any suitable source of power. On each end of the rotor 13 is also bolted or otherwise rigidly fastened an annular plate 24 having an outstanding annular flange 25 which concentrically surrounds the hub extension 2O in spaced relation therewith. In the space lbetween the fiange25 and the hub extension A20 are anti-frictlon rollers 26 which are set in alcage 27. The surfaces with which the anti-friction rollers are in contact are fitted with wear rino's 28 which are removable so ,that they may tbe removed when worn. Endwise movement of the cage of rollers is prevented by the head 19 and the plate 24, the cage bein located between said parts. If

desired, t e plate 24 may be cast integral with the rotor.

Each side of the ump is provided with the herein describe dr1ve gear and antifriction bearing.

A pump constructed as herein described runs easy and smooth, and the parts can be readily assembled, enabling repairs and removal of worn parts to be easily made. The inner ends of the piston wings are cut away except so much as 1s needed for the mounting on t e shaft, whereby a art of the resistance on the wings is eliminated. The rotor is so mounted in the cylinder that the water is prevented from passin bevond the outlet. The rings 28 take up al the wear of the pump, and they can be readily removed when worn and renewed at a nominal cost. This adds greatly to the durability of the pump. The anti-friction rollers are casehardened, and the wear rings are made of softer steel, so that the wear is on the rings.

We claim:

In a pum of the class described, a casing prowded with end closures, alined eccentric osses formed on the inner sides of said closures, alined concentric bosses formed on the exterior of said closures, a shaft journaled Ain seid concentric bosses, a rotor mounted on said shaft concentric with said eccentric bosses, disks fixed to the sides of said rotor and substantially closing the space around the eccentric bosses, annular flanges on said disks projectin over said eccentric bosses in spaced parel el relation thereto, anti-friction rollers between said bosses and flanges, und an operative connection between the rotor and shaft, including internal gears THOMAS HYE. WILLIAM B. CAMPBELL. THOMAS A. BATEMAN.

Witnesses:

T. J. BowLEs, A. L. CAMPBELL.

Sapiens of tml patent may be obtained for Ave cents each, by addressing the Commissioner of Estense Washington, D. 0."

gears fixed to the 

